Explain the terms Synchronous, and Asynchronous transmission of data with a neat diagram

Synchronous Data Transmission:

Fig. : Synchronous Data Transmission

• Synchronous data transmission is a data transfer method in which is a continuous stream of data signals accompanied by timing signals.
•   Synchronous transmission needs synchronization between transmitter and receiver in order to allow communication between the two. The transmitter and receiver share a common clock pulse so as to have synchronization in communication. This means data will be transmitted between the transmitter and receiver only after a constant time interval.
• It allows the transmission of data in the form of frames or blocks. Thus, a huge data amount can be transmitted between transmitter and receiver once the clock pulse is sent

Asynchronous Data Transmission: 

Fig.:Asynchronous Data Transmission 

• Asynchronous transmission is a type of serial transmission that follows a nonsynchronized form of communication. Thus start and stop bits are required in order to intimate the receiver about the beginning and end of the data stream.
• It does not use a clock to synchronize data between the source and destination.
• This transmission method sends one character time. In this method, before the transmission process begins, each character sends the start bit. After sending the character, it also sends the stop bit Thus it is also known as start stop transmission